Dramatic increase in the Raman signal of functional groups on carbon nanotube surfaces

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	Dramatic increase in the Raman signal of functional groups on carbon nanotube surfaces
	D. M. Andrada; H. S. Vieira; M. M. Oliveira; A. P. Santos; L. C. Yin; R. Saito; M. A. Pimenta; C. Fantini; C. A. Furtado
	2013
发表期刊	Carbon
ISSN	0008-6223
卷号	56 页码:235-242
摘要	Raman spectra of octadecylamine (ODA) molecules covalently bound to the surface of single walled carbon nanotubes were obtained by varying the laser excitation energy from 1.92 to 3.81 eV. A strong dependence of the Raman intensity on the excitation energy was observed and, under specific conditions of resonance, the Raman signal from the amide linkage can become even stronger than the resonant Raman signal of the carbon nanotubes. This result is explained in terms of a chemical enhancement mechanism due to charge transfer between the ODA molecules and the nanotubes. The enhancement factor was up to 100 times higher than the value typically reported for the chemical Surface Enhanced Raman Scattering (SERS) effect. Our results show that carbon nanotubes may contribute to the still controversial understanding of the 'chemical' effects to the enhancement in SERS, extending the scope of application of this analytical tool in strategic areas such as biomedicine, catalysis and environmental analysis. (c) 2013 Elsevier Ltd. All rights reserved.
部门归属	[andrada, daniel m. ; santos, adelina p. ; furtado, clascidia a.] ctr desenvoluimento tecnol nucl, br-31270901 belo horizonte, mg, brazil. [andrada, daniel m.] univ fed itajuba, br-35903087 itabira, mg, brazil. [vieira, henriete s. ; pimenta, marcos a. ; fantini, cristiano] univ fed minas gerais, br-31270901 belo horizonte, mg, brazil. [oliveira, marcela m.] univ tecnol fed parana, br-80230901 curitiba, parana, brazil. [yin, lichang ; saito, riichiro] tohoku univ, dept phys, sendai, miyagi 9808578, japan. [yin, lichang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; furtado, ca (reprint author), ctr desenvoluimento tecnol nucl, cp 941, br-31270901 belo horizonte, mg, brazil. ; clas@cdtn.br
关键词	Brillouin-zone Integrations Augmented-wave Method Silver Electrode Bulk Separation Charge-transfer Amide Modes Scattering Graphene Enhancement Spectroscopy
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71141
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. M. Andrada,H. S. Vieira,M. M. Oliveira,et al. Dramatic increase in the Raman signal of functional groups on carbon nanotube surfaces[J]. Carbon,2013,56:235-242.
APA	D. M. Andrada.,H. S. Vieira.,M. M. Oliveira.,A. P. Santos.,L. C. Yin.,...&C. A. Furtado.(2013).Dramatic increase in the Raman signal of functional groups on carbon nanotube surfaces.Carbon,56,235-242.
MLA	D. M. Andrada,et al."Dramatic increase in the Raman signal of functional groups on carbon nanotube surfaces".Carbon 56(2013):235-242.